Tractor disk harrow



Yismsxz April 24, 1928.

C. W. ROBINSCN 'rnAcTo'R DISK HARRow Filed Jam?, 1922 2 Sheets-Shag?. 2

hm/265 WHQL/m5@ Patented Apr. 24, ,1928.

CHARLES w. ROBINSON, oF AUBURN, NEW

ENT OFFICE.

YORK, AsSIGNon cro INTERNATIONAL "Hun-` VESTER COMPANY, OF oHIoAGo,ILLINOIS, A CORPORATION orffNEw JERSEY. l

TRACTOR DISK yI-IARROW.

'. This inventionrelates to double or tan dem disk harrows of the typeadapted for operation by va tracton 1 t Theobjeets ofthe invention areto improve and simplify the constructionof the mechanism through whichthe position '0f the disk` gangs is controlled by f forward and backwardmovement ,of the tractor, and to incorporatey in said mechanism a deviceby which the tractor can be madeL to either positively angle the gangsby ldirect action in backing or is allowed to back without direct actionon the gangs but so adects the angling mechanismthat the gangs will`assumel a working angle when the `harrow is next moved.forwardly.uVAlso, to combine with such mechanism a novel -form of con# nectionbetween the front and rear frames intended to prevent side sway of therear section of the harrowduring operation while `permitting a certaindegree of flexibility during a turn of the harrow ineither direcv tion.

The foregoingobjects are accomplished by including in the gang anglingmechanism a reversible coupling rodeither end ofwhich may, beconnectedato a sliding draft head, one end `of the rod having meanswhereby theconnection withthei draft head remains fixed while the otherend, .without such 7 means, permits ytheldraft head to slidejlongitudinally of the coupling rod, thus giving a choice of two ways foroperating the gang angling mechanism, and also by connecting the twosections` ofthe harrow by a l,novel form of telescopic coupling locatedat the outer ends ofythe kframes and co-operating with the-draft anglingmeans in a manner to straighten the rear gangs whenY the harrow `isbeing backed,

Themainobjects stated, as wellas incidental improvements which willappear from the following descriptiomjare attained bytheorganization-and detailsfof construction or their. equivalents setforthin thefollowing specification and definedl in the claims.:` Referring tothe drawingsfi 1, Figure 1 is a plan View of a .harrow embodying myinvention;

Fig..2 is a side elevation with the' gangs in straightor non-workingposition; Y

Fig. .3 isa similar view with the gangs in working position;

Appueationvnled January 7, 1922. serial No. 527,575.1

Fig. lis `arrenhirged detail `Viewof a portion of the front of theharrow; Fig. 5 is a detail view of a portion of the rearfottheharrow'; rY. Y, l g -,1Fig.\6 isan enlarged kdetail viewfofv one drftcouplingbetween theharrow sections; an f Fig. Tis of Figli," A n `Myxinventionis `disclosed in connection with a tandem harrow having'a front'frame 10and a rear frame 11each carrying the `usual pair of pivoted diskgangs.The front section 10 has a. members l2 which the drafttongue', and theforward endspof these tongue. anglesare `connected,tofthe `lront gangsby means of .rods .13, the `front ends -ofwhich engage openings inaplate 14 on the tongue ,anglesand the rear ends are pivoted `onlugs'lformedfon the bearings fo'r the: frontgangs. The front gangsareconnected to -the frame 10 through the aV sectionv takennon k,line7-7 pair of central ,angle project forwardly to form medium' of linksl,whichy are pivoted to the frame 10 'and to the manner topermitacertainfamount of lat eral movement of the two gangswhenthey rarebeingswung to and from angled position. The rear framell is formedprojecting'uside bars 17 braced by a transverse member 18 and` diagonalbraces 19, and the ,forward ends of the members 17 are received inbrackets 2O fixed to therear corners 0f the front frame t10. Thesebrackets are formed with outwardly extending angular portions 20a, whichare provided with apertures extending in a forennd aft gang frame in adirection in which the kmembers l7are slids ablyreceived, these membershaving their ends outturned as at 17,to. limit their rearward movement.p This construction Vpermits the front and rear `'Sections' of theharrow to approach, each other when the harrowis backed, as the`extension 17 will .then slide through the `apertures in the j extensions2Oa of rbrackets 20 Auntil this kbracket cornes in contact with theend-of th4 diagonal `brace 19 which acts as ay stop, yaswseen iny Fig.6.

Also,`when the harrow is turningfthe `side u `toward whichk the turn 'ismade l,will ytele- 7 scope and the draft will .be-transxnitted throughthe coupling on the opposite side, the apertures in the extensions 20lbeing of sufficient size to ermit such action. This construction provies a substantially fixed connection between the harrow sections, so faras side sway is concerned, while the harrow is moving forwardly, butallows a certain degree of flexibility between the secf lower flat barsV21, the forward ends yof for instance,

which carry a. draft clevis of any preferred form. The upper bar isformed with at least two square perforations 21b adapted to be engagedby a latch member 22 pivoted on the plate 14 and operated by lever 23,which is pivoted to latch 22 near its end and has a portion projectingbeneath it ina manner to act asa cam which lifts the end of latch 22when the lever 28 is pulled forward by the operating cord attached toits opposite end. This latch 22 is adapted to engage in either one ofthe apertures 21b and prevent the forward movement of draft head 21, aswhen it has been backed to the position shown in Fig. 3. The vrear endof the lower bar 21 has a downward extension forming a flat plate as at21, which is pro vided with an opening in which is received the forwardend of a coupling rod 24 which has itsrear end bent laterally andpivotally received in a depending link 25 where it is retained by acotter pin. The link 25V is free to swing forward and back on the tongueangles, and is connected at its lower end by means of links 26 to theinner ends of the front gangs. The coupling rod 24 has a similar lateralextension or hook at eachjend, either of which may be passed through theopening in the down-turned end 21C of the draft head and the other endconnected to the depending link 25 as above described, that is to say,thisrod is reversible. One end of the rod, however, is provided near theangle bend with Van integral stop collar 24a, which is of such size asto prevent the rod from sliding through the opening in the draft headextension 21C. y

It results from this construction that when the rod is arranged, asshown' in Figs. 2 and 3, backward movement of the draft head 21 willcause'it to engage the stop collar 24a and positively push the couplingrod'24 backwardly, communicating the same movement to the links 25 and2G and to the front gangs so that when the draft head is at its limitofmovement, as in Fig. 3, the front gangs will have beenpositively angled.On the other hand, if the link is in the reverse position shown in Fig.'4 the draft head will slidebackwardly on the rod 24 without aecting thegangs until it reaches the position illustrated in dotted lines in Fig.4,

where it becomes locked, and on the next forward movement of the tractorand barrow theresistance of the soil will cause the inner ends of thefront gangs to swing backwardly and rod 24 to slide rearwardly on theexten sion 21c until stopped by 'the hooked end when the gangs will haveassumed the working angleset by backing the draft head. In order tocommunicate the angling movement to the rear gangs a lever-27 is pivotedintermediate its ends on the rear ends of the tongue Langles 12, and theupper end of this lever is connected by va link 28 with a saddle member29 which connects the inner ends of the front gang frames and whichrides on the upper side of the tongue angles as the 'front gangsareangled or straightened. The vlower end of lever 27 lis con# nected bylinks30 with ther inner ends of the rear gangs.k By this arrangement therear gangs are moved in anropposite direction to the front gangs as thedraft head is moved forward or back, and allthe gangs are thus givensimultaneous control.

It will also be evident thatY when the gangs are in angledposition,asshown inthe dotted lines of Fig. 1 or full lines in Fig. l,backing of the harrow will, by rreason of the telescopic connectionsabove described, cause thelinks 30 to puslr the' inner endsy of the reargangs Vbackwardly,r causing them to straighten and the rear gangs willremain'in straightened position asA long as the harrow is being backed,and will again assume their angled position when the harrow movesforward and the rear section assumes its normal position. Ifthecouplingrod 24-is connected as shown 'in Fig. 4'the front gangs will ofcoursestraighten also when the'harrow is backed as the rod 24 can then slidefreely .in the draft head, but the rear gangs will straightenirrespective of the adjustment of thecoupling rod 24, andthis is ofmaterial assistance when backing the barrow out of bad positions.

What I claim as my invention is :v

1. In a harrow, front and rear angular frames, prising straight rigidjmembers fixed to the outer ends of one frame and projecting towards thesecond frame, brackets secured to the outer ends of the second frame-andprovided with projecting portions having fore and aft openings inwhich said members are loosely received, andme'ans permitting limitedlongitudinal movement of said members Withinsaid openings. Y

2. In a harrow, front and rear frames, pivotally mounted disk gangs oneach frame, means for shifting the `front gangs to and from workingangles, alever pivoted intermediate its ends on4 `the" front frame at apoint 'behind the gangs, aflink` connecting the upper end' of said'lever with theffront gangs for movement therewith, a link belll()couplings between the frames com tween the lower end of said lever andthe and telescopically the frames.y front and rear frames,

and forwardly extending rigid bars on the outer ends oi the rear framereceived in said apertures and movable therethrough, said bars havingstops limiting said movement.

\ 4.111 a disk harrow, a frame, a plurality of disk gangs pivotallyassociated with the frame, gang angling devices including a memberslidable relative to the frame andV formed with a vertical plate havingan opening, a member forming a part of operative yconnections betweensaid plate and the disk gangs, said member constituting a reversiblecoupling rod one end of which is .formed with stops adapted to engagethe opposite faces of the plate and providing a relatively lixedconnection with said plate, the other' end of said coupling rod beingformed with a single stop adapted to engage the front face of the plateso as to provide a slidable connection therewithwhenthe rod is re.-versed. c

5. A disk harrow comprising a frame, a plurality of disk gangs pivotallyconnected thereto, gang angling devices including amember ieciprocablymovable relative to the frame, connecting means between said member andthe disk gangs including an `extension on the reciprocably movablemember, said extension being provided with an opening, links connectedto the gangs, andfav reversible coupling member having one vendconnected to the links and its other end received in said opening, bothends of the coupling member being formed with later-V ally extendingextensions, the rod also having an integral enlargementthereon near oneend, said enlargement being adapted to prevent longitudinal movement ofthe rodrelabrackets on the vouter v tive to said extension of saidreciprocable member when the coupling memberis in one position ofadjustment.

, 6. A tandem disk harrow comprising front and rear harrow frames, aplurality of disk gangs pivotally connected to each frame, relativelymovable members affording draft connections between said frames,gangangling devices including a member reciprocably movable relative to thefrontr rharrow frame, connecting means between said reciprocably movablemember and said disk gangs, said connecting means including anextensionof the reciprocably movable member, said extension ybeingprovided with an opening, connecting devices between the in` ner ends ofthe front and rear pairs of gangs, links connected to the inner ends ofthe front gangs and extending forwardly therefrom, and a reversiblecoupling rod having one end connected to thelinks and its other endreceived in said opening, both ends of the coupling rod being formedywith laterally extending extensions, the rod also having an integralenlargement thereon near one ofsaid extensions, said enlargementsubstantially preventing longitudinal movement of the rod relative tosaid extension of the said recipro'cable member.

7. In a disk harrow, aharrow fra-me, disk gangs, controlling theanglingand straightening of the gangs, said devices including a unitaryreversiblerod having means formed thereon which in one position ofadjustment of the rod enables the gangs to be by a backward thrusttransmitted to the gangs through said unitary reversible rod and inanother position of adjustmentof the rod provides a lost motionconnection which and draft governed devices for' positively angled fdetermines the angles which the gangs may Y`

